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Prof. Godfrey Akpan Iwo

Full Professor
Crop Science
ga_iwo@unical.edu.ng

Professor Godfrey Akpan Iwo is an experienced Lecturer and an industry-oriented Researcher with specialization in Plant Breeding and Cytogenetics. Through dedicated, committed and collaborative scientific research efforts, he has developed and released five (5) elite varieties of Sesame (Sesamum indicum L.) and fifteen (15) mutant lines of Ginger (Zingiber officinales) with high oleorosine contents. He has also successfully characterized the existing sugarcane genotypes in Nigeria. Other crops worked on includes, rice, sorghum, cucumber and soybean. He has served the University at different capacities as the Head, Department of Crop Science, academic adviser to Undergraduates and Supervisor and Co-Supervisor to 12 PhD and 8 MSc postgraduates.

Iwo G.A and Uwah D.F (2008). On-farm evaluation of Groundnut varieties for seed and Forage yields in Southern Guinea Savannah of Nigeria. UNISWA Research journal of agriculture, Science and Technology, University of Swaziland, Vol. 11,No.2, 129-134.


Iwo, G.A. and S. Agboire (1992). Polyploidy spectrum of local sugarcane clones in Nigeria. Feddes Repertorium (Berlin) 103, 3-4, 175-176.


Hussaini S.W.H. and Iwo, G.A. (1992). Cytomorphological studies of some weeds in the family Leguminosaes from Jos, Plateau StateNigeria. Feddes Repertorium (Berlin). 103,1-2, 1110120.


Iwo.G.A, Amadi.C.O, Eleazu.C.O and Ukpabi.J.U (2013).Induced mutagenesis on ginger for improved yield components and oleoresin content. Canadian journal of Plant Breeding, Vol.1(3):90 – 95.


Iwo, G.A (1992). Cultural and agronomic approaches to control Striga gesnerioides. National Workshop on Striga at Akure, OndoState, August 18-21, 1992.


Iwo, G.A. and Hussaini, S.W.H (1992). Comparative anatomy of cowpea in varieties in relation to their resistance to Striga. Book of Abstract, 6th Annual Conference of Botanical Society of Nigeria at the University of Jos, Plasteau State, March 29 to April 4, 1992


Iwo.G.A and Amadi.C.O (2013).Evaluation of Advanced M4 mutant lines of ginger for selection. Nigerian Journal of Genetics, Vol.27 : 151 -156


Iwo, G.A. and Olaniyan, G.O. (1992). Evaluation of field resistance of Sorghun varieties to Striga (Witchweed). Book of Abstract, 22nd Annual Conference of the Nigerian Society of Plant Protection at University of Agriculture, Abeokuta, April 6-9, 1992.


Abua M.N , Obok.E.E and Iwo.G.A (2013).Inheritance of seed coat colour of some cowpea genotypes.Nigerian Journal of Genetics, Vol.27 :97 -108


Akpaniwo, E. G, Ittah, M. A and Iwo, G. A. (2015).Field Performance and Morphological Variations of X-Ray Induce M2 Mutant Lines of Fluted Pumpkin (Telfairia Occidentalis, Hook. F.). International Journal of Research in Agriculture and Forestry, Vol 2, Issue 10, October 2015, PP 12-16.


Iwo, G. A, Ntia, J. D, Akpaniwo E. G. (2016). Yield and yield Component Association of some Capsicum Genotypes. Global Journal of Agriculture, Vol. 15:17 -19.


Olaniyan, G.O. and Iwo, G.A. (1991). Preliminary results on seed and soil treatment as control strategies for Strigahemonthica Benth. In peasant Agriculture. Book of abstract, 19th Annual Conference of Weed Science Society of Nigeria, At ABU, Zaria, December 1-5, 1991.


Iwo G. A. (1991). The cytology of sugarcane: A preliminary evaluation of local accessions of sugarcane germplasm in Nigeria. Book of Abstract, 5th Annual Conference of Botanical Society of Nigeria at ObafemiAwolowoUniversity, Ile-Ife, March 3-6, 1991.


Iwo G. A. (1990). Integrated approach to Striga control. A Seminar Paper presented in National Cereals Research Institute, Badeggi.


Onyekwere,I.N, Iwo,G.A ,Ano,A.O and Osunde, A.O(2016)Evaluation of Nutrients Status of soils under Rice Cultivation in Cross River State, Nigeria,Vol.15: 49 -55.


Odor,E.O , Iwo,G.A and Obok E.E(2017).Graphical assessment of yield stability and adaptation of cucumber(Cucumis sativus L)genotypes in Cross River State,Nigeria. Journal of Agriculture and Crop Research, vol. 5(6)108 -116.


Udo.Diana-Abasi.A., Rasmussen Soren.K, Jacobsen.S.Erik, Iwo.G.A and De milliano Walter(2018).Evaluation of sweet sorghum genotypes for reaction to striga hermonthica (Del.)in Nigeria. International journal of Research in Agriculture and Forestry, Vol.5 (2)10 -20


Iwo, G.A and Odor, E.O(2017). Genotype x Environment interaction for yield of some cucumber(Cucumis sativus)genotypes in Cross River State, Nigeria. Global journal of Agriculture, Vol. 16.(In press)


Iwo, G. A., Idowu, A. A. and Misari, S. M. (2007). Genetic variability and correlation studies in sesame (Sesamum indicum L.). Global Journal of pure and Applied Science. Vol. 13 (1) 35 – 38.


Iwo G.A and Olorunju P.E (2009). Yield Stability and Resistance to leaf Spot Diseases and Rosette in Groundnut. CzechJournal of Genetics and Plant Breeding, vol. 45, 18-25.


Tiamiyu, S.A. Anuonye J.C., Iwo G.A. and Idowu A.A. (2002): Cost – Benefit Analysis of Sesame Production In Nasarawa State, Nigeria. Tropical Oilseeds Journal Vol. 7: 101-108.


Iwo, G. A. and Uwah, D. F. (2007). Efficacy of beniseed (Sesamum indicum) as a trap crop to striga species (parasitic weed). Nigerian Journal of Weed Science. Vol. 20:47 – 51


Iwo G.A. and Idowu A.A. (2002). Impact of beniseed Research and Development Towards Poverty Alleviation in Nigeria. NOMA Vol. 16:15-21


Uwah, D. F. Iwo, G. A., Effa, E. B., Matthew, U. U. and Odinigwe, C. C. (2010). Growth and leaf yield of vegetable Amaranth (Amaranthus cruentus L.) as affected by nitrogen and potassium fertilizers. Journal of Applied Sciences, 13(2):9176-9187.


Uwah, D. F., Iwo, G. A. and Nwangwu, F. (2010). Response of Okra (Abelmoschus esculentus (L.) Moench) to different rates of nitrogen and lime on an acid soil. International Journal of Agricultural Science.International journal of agric.Sc.(India) vol.2:14-20


Iwo G. A., Hussaini and Etebom S. A. (2002) Phenolic compounds in cowpea and their effect on thre growth and development of Striga gesneriodes. Nigerian Journal of Weed Science, Vol. 15:53-56


Nwagwu, F. A. Uwah, D.F., Iwo, G. A. and Nsemo, G. (2008). Effect of Different seed beds on weed control and performance of Okra in Calabar.Journal of Applied Science. Vol. 11 (1) 7539 – 7550.


Iwo G.A, Idowu A.A. and S.M. Misari (2005) Collection and Evaluation of Sesame germplasm in Nigeria. IPGRI News Letter, Rome, Italy No 142:59-62.


Alegbejo M.D., Iwo G.A. Abo M.E and Idowu A.A. (2003) Sesame: A Potential Industrial and Export Oilseed Crop in Nigeria. Journal of sustainable Agriculture (USA) Vol. 23, (1) 59-76


Iwo G.A., Idowu A.A. and Olurunju P.E (2001). Genotype X Environment Interaction for Pod of Groundnut Varieties in southern Guinea Savanna of Nigeria. Nigeria Journal of Genetic, Vol. 16:48-51.


Hussaini, S.W.H. and Iwo, G.A. (1990). Cytomorphological studies of some weedy species of the family Solanaceae from Jos, PlateauState. Feddes Repertorium (Berlin).101, 1-2, 41-47


Hussaini, S.W.H. and Iwo, G.A. (1990). Cytology of some weedy species of the family Compositea (Asteracea) from Jos Plateau State, Nigeria. Feddes Repertorium (Berlin) 101, 1-2. 49-62.


Iwo, G.A., Olaniyan, G.O. and Hussaini S.W.H. (1993). Cytological observations and distribution of Striga species is central part of Nigeria. Feddes Repertorim (Berlin) 104, 5-6


Iwo, G.A., Kwon-Ndung, E.H. and S.M. Misari (1996). Estimate of pollen viability in sugarcane through invitrotechniques. Agricultural Tropica et subtropica. Praga Vol. 29:115-119.


Olaniyan, G.O. and Iwo, G.A. (1993). Field evaluation of Sorghum varieties for reactions to witch weed: Striga hermonthica (Del Benth. In Nigeria. Agricultural Tropica et subtropica, Universitas, Agriculturae, Praga. Vol. 26: 79 – 84.


Iwo, G.A., Hussaini S.W.H. and Misari, S.M. (1998). Sources and genetic of resistance to witch weed (Striga gesnerioides) Wild Vatke) in Cowpea. Nigerian Journal of Genetics, Vol. XIII: 30-33.


Iwo G.A., Hussaini S.W.H. and Misari S.M. (1999). Mechanisms of cowpea resistance to parasitic weed (Striga gesnerioides) in cowpea. Nigerian journal of plant protection vol. 18:1-11


Misari S. M. and Iwo G.A (1999). Prospect of Beniseed Research and Development in Nigeria. In Genetics and crop improvement in Nigeria in the twenty-first century edited by D. O. Ladipo and Gbadebo. Pp. 152-161.


Iwo G.A., S. Agboire, K. I. Nwosu (1999). Chromosomes and Mophological characteristics of indigenous sugarcane clones in Nigeria. Nigerian Journal of Genetics.Vol,XIV:1-4


Wada, A. C. and G. A. Iwo (1997). Evaluation of some sugarcane accessions for their reactions to smut disease (Ustilago scitaminea Syd.) in Nigeria. African Journal of Natural Sciences. Vol 1and2.


Iwo G.A., Idowu A.A. and Ochigbo A.A. (2002). Evaluation of Sesame (Sesamum indicum L.) Genotypes for yield stability and selection in Nigeria. The Nigerian Agricultural Journal Vol. 33:76-82


Abo M. E, Iwo G. A, Misari S. M, Ochigbo A. A. and Fatoba I. O (2000). Biotechnological Development Investment and Research needs in Developing countries. NOMA Vol. 15:20-23


Iwo G.,A. and Hussaini S.W.H. (2001) Variability of Ploidy Levels of Three Sugarcane Species in Nigeria. Sugar Tech.(India) Vol.3, (4): 166 –170)


Uwah.D.F ,Udoh.A.U and Iwo.G.A (2010) Effect of organic and mineral fertilizers on growth and yield of Cocoyam(Colocasia esculenta(L) Schott). International journal of agric. Sc. (India) vol.3:33-38


Uwah.D.F ,Iwo.G.A, Nwagwu.F.A,Amaefula.C. and Joseph.S.N (2010) Effect of harvest frequency and Nitrogen rates on growth and edible leaf yield of fluted pumpkin (Telfairia occidentlis. Hook.F). Journal of Applied Sciences, 13(3):9199-9214.


Iwo,G.A and Ekaette,E.A (2010) Genetic component analysis of yield related traits in some ginger genotypes. Nigerian journal of genetics, vol24:81-85


Iwo, G. A. and Obok E. E. (2010): Agronomic performance and estimate of genetic variability of upland rice genotypes on acid soil condition of CrossRiverState. Global Journal of Agricultural Science vol.9 (1):1-7


Onyekwere, I.N, Iwo.G.A, Eze. P.C , Korieocha, D.S and Nwokocha, C.C (2010) Characteristics and management of fadama soils of Barkin Sale in Niger State, Nigeria. Nigerian Agricultural Journal,vol.41(1):101-107


Onyekwere,I.N ,Iwo .G.A and Ano, A.O (2010). Evaluation of water quality for rice production under irrigation in Cross River State,Nigeria. Nigerian agricultural Journal, vol.41 (2) 45-48.


Iwo, G.A and Udoinyang S.F (2011) Genetic variability and heritability of yield components in cocoyam. Nigerian journal of genetics, Vol.25:106-112


Iwo, G.A, Uwah,D.F and Uko,A.E (2011) Variation in agronomic performance and proximate composition of some ginger genotypes in humid agro-ecology of Nigeria. Journal of agriculture, Biotechnology and Ecology (China) 4(1)13-18


Macauley ,A.Ittah, Iwo, G.A, Osai,E and Ene E.A(2011) Response of soybean genotypes to soybean rust (Phakopsora pachyyrhizi) infection in Nigeria.Journal of agriculture, biotechnology and ecology (China) 4(3)54-69.


Uwah.D.F and Iwo, G.A (2011) Effectiveness of organic mulch on the productivity of maize (Zea mays L.) and weed growth. Journal of Animal and plant Sciences, 21(3):525-530.


Iwo, G.A, M.A. Ittah and E.O.Osai (2012) Sources and genetics of resistance to soybean rust(Phakopsora pachyrhizi. Sydow and Sydow) in Nigeria. Journal of agricultural Science(Canada) vol.4(10)1-6


Effa, E.B, D. F. Uwah, G. A. Iwo, E.E. Obok and G.O. Ukoha (2012): Yield Performance of Popcorn (ZeaMays L. everta) Under Lime and Nitrogen Fertilization on an Acid Soil. Journal of Agriculture Science, Vol. 4, No. 10


Obok,E.E M. E. Aken, Ova and G. A. Iwo (2012): Forage Potentials of Interspecific Hybrids between Elephant Grass Selections and Cultivated Pearl Millet Genotypes. Journal of Plant Breeding and Crop Science Vol. 4(9), Pp 136-143.


Eleazu, C. O., Amadi, C. O. and Iwo, G. A.(2012): Biochemical qualities of 10 elite accessions of ginger (Zingiber offincinale Roscoe). African Journal of Food Science and Technology,Vol. 3(8) pp. 187-192.


Ikeh,A.O, N. U. Ndaeyo, G. A. Iwo, O. S. Aderi, J. E. G. Ikeorgu, E. C. Nwachukwu and B. A. Essien (2012): Effects of Cropping Systems on Growth and Yield of Yam (Dioscorea rotundata)Genotypes and Egesi Melon (colocynthis citrullus) on an Ultisol. International Journal of Applied Research and Technology. Vol. 1(1): 119-131.


Iwo.G.A, Ufot. E.Ezekiel and Uwah.D.F (2012). Selection Criteria for Stem and Yields in Cassava (Manihot esculenta Crantz).Journal of American Science, Vol.8(12):1120-1124.


Eleazu,C.O,Amadi.C.O, Iwo.G ,Nwosu.P,Ironua.C.F (2013).Chemical composition and Free Radical Scavenging Activities of 10 elite Accessions of Ginger (Zingber officinale.Roscoe) Journal of Clinical Toxicology,vol.3:155


Iwo, G.A. (1993). Cyto-taxomomical studies of local sugarcane clones in Nigeria. A paper presented at seminar in National Cereals Research Institute, Badeggi. July 29, 1993.


Iwo, G.A. (1994) Studies on mechanisms of resistance to Striga gesnerioides in some cowpea varieties. Book of Abstract, 23rd Annual Conference of the Nigerian Society Plant Protection held in Lagos in May 15-18, 1994.


Iwo, G.A (1995). Antibiosis factor: A resistant mechanism in Cowpea to Striga. Book of abstract, 24th Annual Conference of Weed Science Society of Nigeria, held at IITA, Ibadan, Nov. 6-10th 1995..,


Iwo G.A., M.S. Misari and A.A. Idowu. (1998). Current Status of Beniseed Improvement in Nigeria. First National Workshop on Beniseed held at National Cereals Research Institute, Badeggi. 3-6 March, (1998).


Iwo G.A. (1999). On-farm evaluation of dual purpose groundnut varieties in Niger State. A report presented at the Review and planning workshop held at Kaduna 5-6th May, 1999.


Iwo G.A. (1999). Biotechnology in Genetic Transformation of crop plants. In Book of abstract, 12th Annual Conference of Biotechnology Society of Nigeria at New Busa


Iwo G.A. and Idowu A.A.and Misari S.M (2001). Evaluation of Sesame (Sesemun indicum L.) for yield stability and section in Nigeria. Book of Abstract, Genetic Society of Nigeria Annual conference, held at New Busa, 3rd – 7th September, 2001.


Iwo G.A. and Idowu A.A. (2002). The Efficacy of Beniseed as a trap crop to Striga Species (Parasitic weed). Paper presented at Weed Science Society conference at NIFOR Benin. 3-7 November 2002.


Iwo G.A. and Idowu A.A. (2001). Impact of research and development on Sesame towards poverty alleviation in Nigeria. Book of Abstract, 5th Biennial international Conference of the African Crop science Society held at Lagos, Nigeria. 21st – 26th October 2001.


Iwo G.A. and Idowu A.A. (2005). Evaluation of groundnut genotypes for rosette resistance in Southern Guinea Savannah in Nigeria. Book of Abstract, 32nd Annual Conference of Nigerian Society for plant protection held at University of Port Harcourt, 15th-20th May, 2005.


Iwo, G.A and Udoh,U.E(2009) Field evaluation of some cassava genotypes for stem yield. Book of Abstract,43th annual conference of agric. Society of Nigeria held at Abuja,20-23rd oct.2009.


Iwo, G.A and Akpan,E.E(2010) Variation and proximate analysis of ginger genotypes. Book of Abstract,44th annual conference of agric. Society of Nigeria held at Ogbomoso,18-20th,October 2010.


Iwo,G.A, ,Nwauzo E.C and Chukwura E.C (2011) Induction of genetic variability in ginger through gamma-ray irradiation. Book of Abstract, 35th conference of genetic society of Nigeria held at ABU, Zaria,10-13th October 2011. In proc. Genetics Society of Nigeria of 36th Annual conference at University of Calabar on 15-18th October,2012


Olaniyan, G.O. and Ogunremi, L.T. and Iwo G.A. (1994). Highlight of Research Activities in the search for Striga control at the National Cereals Research Institute, Badeggi, Nigeria. In. towards an integrated control of Striga in Africa. Edited by R. Traboulsi, S.T.O. Lagoke, R. Hoevers and S.S. Mboob. Proc. First PASCON general workshop, Ibadan, March 11th-14th, 1990.


Iwo, G.A. (1996). Groundnut Production in Niger State. In. nationally Coordinated Groundnut Research Project-workshop Proceedings. Edited by Olorunju P.E., Ntare B.R., Babatola O. A., and O. Alabi. IAR Zaria, Nigeria 25-29 Sept. 1995. Pp. 35.


Iwo, G.A., Misari, S.M., A.A. Idowu (1997). The need for Biotechnological approach in soybean germplasm preservation. A paper presented at the International Conference on Biotechnology for Development in Africa, held at Enugu, Nigeria. From 9-13 Feb. 1997.


Ndarubu A.A., Usman A., Iwo G.A. and Idowu A.A. (2002). Effect of planting arrangement on the productivity of sesame/maize intercrop. In proc. Agric Society of Nigeria of 25th Annual Conference at Abeokuta Sept. 16 – 20th 2001.


Iwo G.A. and Idowu A.A.(2004). Evaluation of Advanced Groundnut lines for resistance to leaf spot disease and rosette in Southern Guinea Savannah of Nigeria. In Proceedings of the 29th Annual Conference of Genetics Society of Nigeria . Edited by O.J. Ariyo, C.O.N. Ikeobi, M.O. Ozoje, I.T. Omoniyi and O.B. Kehinde. October 11th-14th 2004.


Iwo. G. A. and Obok E. E. (2008): Agrononmic performance and response for some groundnut varieties to leaf spot diseases in the humid area of CrossRiverState. In proc. Of 42nd Annual Conference of Agricultural Society of Nigeria (ASN). Edited by K. N. N. Ezike, L. L. Osakwe, L. G. Ekwu, E. Utobo and C. N. Mbah, Oct. 19 – 23rd 2008.


Iwo G A and Udo U. E (2009).Field evaluation of some cassava genotypes for stem yields. In Proc.Agric.society of Nigeria of 43rd Annual conference at Abuja,20th-23rd oct. 2009


Iwo , G.A and Akpan. E.E (2010) Variation and proximate composition analysis of ginger genotypes. In pro. Agric.Socety of Nigeria of 44th Annual conference at Ogbomoso, Oyo State, Nigeria on 18th-22nd October, 2010


Iwo, G.A , Nwauzo E.C and Chukwura E.C (2011)Induction of genetic variability in ginger through gamma- ray irradiation. In proc. Genetics Society of Nigeria of 35th Annual conference at ABU, Zaria on 10th-13th October, 2011.


Iwo,G.A, Amadi.C.O, and Udo.I.A(2012).Agronomic performance of ginger mutant clones derived from gamma-ray radiation. In proc. Genetics Society of Nigeria, 36th Annual conference at University of Calabar on 15-18th October, 2012


Abua.M.N ,Iwo.G.A and Obok.E.E (2012).Morphology and Phenological studies of some Solanum species .In proc. Genetics Society of Nigeria of 36th Annual conference at University of Calabar on 15-18th October, 2012


Iwo G.A and Amadi C.O (2013).Field performance and selection of advanced M4 mutant lines of ginger for selection .In proc.Genetics society of Nigeria 37th Annual conference at Nasarawa State University,21 – 24th October,2013.


Iwo G.A (2014) Rice Value Chain and Its Challenges in Nigeria. A paper presented at the International FMB Fertilizer Conference Marrakech, at Kenzi Menara Palace, Morroco. February 19-21 2014.


Iwo.G.A,and Odor.E.O(2016). Genotype X Environment interaction for yield of some cucumber (Cucumis sativus)genotypes. In Book of Abstract, Genetic society of Nigeria 40th Annual conference held at University of Jos from 31st oct.-3rd November,2016

No Results for Research Works done
No Results for Conferences Attended
No Results for Grants/Awards Received